IFLA_BOND_PRIMARY
[IFLA_BOND_PRIMARY] = { .type = NLA_U32 },
if (data[IFLA_BOND_PRIMARY]) {
int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
data[IFLA_BOND_PRIMARY], extack);
nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))